Sodium Bicarbonate, commonly known as baking soda, is a versatile inorganic salt widely utilized in cosmetic formulations for its varied functional properties in skincare and haircare. In skincare, it serves as a mild abrasive, effectively exfoliating dead skin cells to promote a smoother, brighter complexion. Its deodorizing capabilities neutralize odors, making it a staple in natural deodorants, while its buffering action helps maintain the skin’s natural pH (approximately 4.5–5.5), supporting the acid mantle and reducing irritation. Research suggests it may also exhibit antibacterial properties, potentially aiding in acne management by reducing Propionibacterium acnes on the skin surface. These attributes make Sodium Bicarbonate a popular choice for facial scrubs, body washes, and deodorant products, typically formulated at 1–5% concentrations to balance efficacy and gentleness. Its affordability and natural origin further enhance its appeal for eco-conscious formulations.

In haircare, Sodium Bicarbonate is primarily used as a clarifying agent, removing product buildup, excess sebum, and dandruff from the scalp, resulting in cleaner, shinier hair. Its abrasive nature helps exfoliate the scalp, potentially alleviating flakiness and supporting a healthy scalp environment.